5480728
Description
Flashcards by Vivi Grace, updated more than 1 year ago
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Created by Vivi Grace
about 8 years ago
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| Question | Answer |
| what is homeostasis? | the process of keeping things at a stable level. |
| what are the two body systems that control homeostasis? | > The nervous system > The endocrine system |
| what is the structural hierarchy within organisms? | > Cells > Tissue > Organs > Organ Systems |
| define the nervous system. | controls and communicates with all the other systems in the body, helps us feel, process and react to sensations, performs both conscious and subconscious actions |
| what are the parts of the nervous system? | > Central nervous system (CNS): made up of the brain and spinal cord > Peripheral nervous system (PNS): Nerve pathways and endings > These two systems are constantly communicating |
| what are the main parts of the PNS? | > Sensory division: picks up sensory stimuli and send this information to the brain > Motor division: |
| what are the main parts of the motor division? | > Somatic nervous system |
| what are the main parts of the autonomic nervous system? | > Sympathetic nervous system: speeds up the body's functions > Parasympathetic nervous system: slows down the body's functions |
| What is the name given to nerve cells, and what is their purpose? | Neurones. These cells carry very fast electrical impulses from one part of the body to another. Neurones can only travel in one direction. |
| What is the basic structure of a neurone? | |
| What are the three types of neurones? | 1. Motor neurone (multipolar) 2. Interneurone (multipolar) 3. Sensory neurone (unipolar) |
| Describe inter-neurones. | Located in the CNS, transmit messages between sensory neurones and motor neurones. (multipolar) |
| Describe sensory neurones. | Carries messages from receptors in the PNS to the CNS (unipolar) |
| Describe motor neurones. | Cary messages from the CNS to effectors in the PNS, controls all motion. (multipolar) |
| What are effectors? | They bring about motion and change in the body through triggering muscles and glands. |
| What are "helper" nerve cells called, and what are their purpose? | glial cells. these cells protect neurones, |
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